?1 



' > 1 ) , 

 Ill, ; in whi c 



ation c isc a there is a layer 



of oil clrc isc, the cent- 



very peculiar mc . - i . lIs are cut out of 



the protoplasmic disc in successiv ove 



Last is mt of 



"blastodisc le process has ended.. The e; ^ lig- 



ation for this is that the prot Dntinues to fl 



out of the yolk into th isc until i has 



i stance . f fer ( '68) 



untj j,fter 

 the four-cellc . 



ion for escrih- 



i most vrorkcrs on onoids, n< 



nn( '88) for . Latest oi 



Kow 

 found essenti . ion in .Ca- nd 



Eolyac ant s . 



The cent nuclei, in types I. and II., 



originate by division of . ate 



centraiv/-v . [II, , the 



Aants of ition cells, 



i th- 



